jp2112

Show Comment Policy lets you display a custom message above your site’s comment form. Display your blog comment policy or any other text you want your readers to see.
Use it for:
<ul>
<li>Comment policy</li>
<li>Posting rules</li>
<li>List of allowed HTML tags in comments</li>
</ul>
<h3>If you need help with this plugin</h3>
If this plugin breaks your site or just flat out does not work, please go to <a href="https://wordpress.org/plugins/show-comment-policy/#compatibility" rel="ugc">Compatibility</a> and click “Broken” after verifying your WordPress version and the version of the plugin you are using.
Then, create a thread in the <a href="https://wordpress.org/support/plugin/show-comment-policy" rel="ugc">Support</a> forum with a description of the issue. Make sure you are using the latest version of WordPress and the plugin before reporting issues, to be sure that the issue is with the current version and not with an older version where the issue may have already been fixed.
Please do not use the <a href="https://wordpress.org/support/view/plugin-reviews/show-comment-policy" rel="ugc">Reviews</a> section to report issues or request new features.

Show Comment Policy

Display your site's comment policy above the comment form.

levi.putna

The WordPress Terms & Conditions plugin, pops up a Terms & Conditions agreement page the first time a user logs in. In addition the new users are presented with a nice fully customisable welcome message after they agree to your Terms to help them get started using your blog.
For WordPress installations setup with the multiple site option the Terms & Conditions will pop up the first time a user loges into there new site.
Features 
* Works for both New Blogs and New users. 
* Customisable Open Source Terms of Use agreement. 
* Customisable Open Source Privacy Policy. 
* Customisable Welcome Message. 
* Can be integrated into a mature blog. 
* Support for both WordPress and WordPress MU. 
* No changes need to be made to the Sign up process.

Terms & Conditions

This Plugin adds a Terms & Conditions agreement page the first time a user logs in and a welcome message for new members.

Show Comment Policy vs Terms & Conditions